"Sure, As long as the machines are workin' and you can call 911. But you take those things away, you throw people in the dark, and you scare the crap out of them; no more rules...You'll see how primitive they can get."

WOW!
At first was amused until I saw the poor guy on the stretcher.
At the risk of sounding stupid, can someone explain what exactly happened?
(Yeah, I know....Da gun blowed up!)
If a cartridge explodes, would'nt the damage be closer up the barrel, closer to the point of firing pin contact?
And what is that gizmo in the last frame?
TX!

Apparently the fellow left the bore sighting device (thats the pinkish object in the last frame!) in the muzzle. It acted as a bore obstruction and the bbl split. Moral: don't leave anything in bbl!!!

FYI: same results'l happen if you fail to seat a ball on the powder charge in a muzzle loading rifle....not always, but enough blow ups are recorded to make me cautious as hell...BO (of all types) is best avoided!

DUH!
Jeez, is that thing put in so tight that it wouldn't just pop out?
And does it use a laser for adjusting?

Its a matter of pressure. The bore-spud has to be snug enough to give reasonable alignment, and it has either the weight of the collimator, or battery and emitter, providing inertia. Throw a projectile with energy to propel it >2000 fps, and the bore sight can't be pushed far enough fast enough to clear the bore, sooo...